Yeah I'm also bothered by the "How to become a Nour" thing. You have to be bitten by your true love and…
When Ken spoke about the true love thing, for me it meant reciprocity. Now, I can totally get if "they died, I fell in love again and can turn my new lover into a Nour because they are my new true love". If you take the reciprocity out, well.. Ken wouldn't be the only Nour thinking he suffers alone and wanting to die at all cost. Shita would've been HUNTED for his ability.
episode 8• Where you been bro??• Put a guard on Doc too• NOUR DOC??• He still wants to key himself •…
Yeah I'm also bothered by the "How to become a Nour" thing. You have to be bitten by your true love and thus can spend happy eternity with them. But how did the first Nour of a couple become one then?
K-Drama 
Now, I can totally get if "they died, I fell in love again and can turn my new lover into a Nour because they are my new true love".
If you take the reciprocity out, well.. Ken wouldn't be the only Nour thinking he suffers alone and wanting to die at all cost. Shita would've been HUNTED for his ability.
You have to be bitten by your true love and thus can spend happy eternity with them.
But how did the first Nour of a couple become one then?